Air purifier



FIG. 1 is a perspective view of an air purifier showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a plan view thereof;

FIG. 5 is a bottom view thereof;

FIG. 6 is a left side view thereof;

FIG. 7 is a right side view thereof; and,

FIG. 8 is a cross-sectional view thereof taken along line 8-8 in FIG. 2.

The broken lines depict portions of the air purifier that form no partof claimed design. All features shown in broken lines in FIG. 8,including the cross sectional hatching, form no part of the claimeddesign.

The ornamental design for an air purifier, as shown and described.